Opera idea. Need some feedback

So I was just thinking of things off the top of my head for fun because I was bored, but then I came up with an idea for a libretto and I thought, “Hold on. This actually is a great idea.” Thing is, I’m not sure if it is. I’m just thinking wildly, and would probably never be able to write an opera given how complex they are. But I just thought of an interesting story, and I want to know if it’s interesting.

So I would call it The Judgement of Salazar. It follows the main character Salazar Buressi, a cruel rapist and murderer of women. The story takes place in Rome, maybe late 18th century. It starts on a dark night a little after the sunset. It follows a woman walking down the empty street talking to herself, apparently trying to get home. Then Salazar kidnaps her by holding a knife to her throat, takes her behind a building, and prepares to abuse her. However, she fights back and grabs the knife from his hands and stabs him in the stomach. He quickly snaps her neck to prevent her from escaping. Salazar stumbles onto the street and dies.

He gets sent to Hell and is greeted by Satan. The Devil is excited to have such a horrible person in his presence, and sentences him to the most brutal torture for eternity for his crimes. Salazar begs him to let him go free, and promises he will amend his ways if he does. Satan obviously doesn’t think he can, so after a lot of persuading, he plays a game with Salazar. He agrees to let him temporarily return to the mortal world, but he must prove that he can change. He must find a woman whom he loves and she loves him in return, and they must be married within half a year. If he does, then he’ll allow him to go to heaven since his death is irreversible in the first place.

Salazar returns to his home unharmed, and vows to be successful. He thanks the Devil for his forgiveness and promises he won’t fail. He then goes to bed for the night. The scene then cuts to the street the where Salazar and the woman died, several hours later, still nighttime. It shows a Roman guard supposedly searching for someone. he stumbles upon the woman’s body, and upon closer inspection, he realizes it’s the woman he has been searching for. He cries and is mortified that he found her dead. He notices the knife she used to kill Salazar laying next to her corpse, he picks it up and finds Salazar’s name engraved on the handle. He carries the knife and the woman’s body to Emperor Motili’s palace.

when he presents the body to him, it’s revealed that the woman was the emperors daughter Angela, who would often disguise herself as a commoner so she could roam the city without the fear of being kidnapped and ransomed. He mourns for his daughter and his sadness turns to rage. The guard shows him the knife, and so the emperor orders that every guard is to search for Salazar and bring him back alive so he can execute him personally.

Salazar awakes the next day ready to find the love of his life. He spends much of the day goofing off and drinking, but soon finds a sign that demands anyone familiar with a Salazar Buressi to bring him alive to the emperor to be executed, as punishment for the under of Angela Motili. Salazar becomes frightened; he had been able to stay off the radar for a long time, but now that the emperor was involved, he became deathly afraid. He then sees a Roman troop battalion marching down the street, obviously looking for him. He dashed to a nearby house and bangs on the door. A young pretty woman named Maria answers and he puts a knife to her throat and forces himself in. He demands that she is to grant him protection from the emperors troops or he will kill her. After a brief quarrel she reluctantly agrees.

A lot of what’s next is undecided, but eventually he begins to fall for her, and she starts to respect him. Satan has been watching all these events unfold from Hell, and he gets very angry at Salazar’s imminent success. He then devised a plan to get him to fail. He goes to the mortal world and disguised himself as a commoner. He goes to the emperors palace and provides information on Salazar’s exact location. The emperor thanks him and sends all his troops to the woman’s house.

The next day, Salazar plans to confess his love for her, but he’s interrupted by the Roman guards breaking into Maria’s home. They flee quickly and are chased down. He pulls out his knife and kills them. He and Maria escape to Vienna. Now that they are safe, he plans to tell her he loves her and ask for her hand in marriage. Before he can though, Satan appears between them. He then laughs and tells Salazar his time is up and it’s time for him to go to Hell. Salazar once again begs to give him some more time and that he was about to tell her he loves her. Satan just laughs and grabs Salazar by the foot and drags him through a portal to hell. He pleads for Maria to save him and she tries but he disappears through the portal. She weeps and cries for him. Then in a desperate atttemlt to be with him she goes back to Rome, sneaks into the emperors palace and kills him in his sleep. She then takes his head to the guards and presents it as a prize so that they will kill her for murdering Motili. She knows that her actions will send her to hell, which is the only way she can be with Salazar again. The opera then comes to an end with her about to be decapitated by the Royal exexutioner. And she yells to Salazar that she is coming for him. The curtains close as the executioner swings the axe, and close completely before the audience can see her being killed.

Just a thought off the top of my head.